An event-related potential examination of masked and unmasked repetition priming in Alzheimer's disease

Implications for theories of implicit memory

David M. Schnyer*, John J B Allen, Alfred W. Kaszniak, Kenneth I. Forster

*Corresponding author for this work

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    Fifteen patients diagnosed with Alzheimer's disease (AD) and 26 matched older controls engaged in a lexical-decision task with a list of words and nonwords while event-related brain potentials (ERPs) were recorded. Two repetition conditions were embedded in the list: words repeated at relatively long lags or words repeated shortly after a brief masked presentation. Although older controls displayed behavioral and ERP repetition priming for words repeated at long lags, consistent with previous studies, AD patients displayed neither. In contrast, both controls and AD patients displayed an ERP repetition priming effect for words repeated shortly after a brief masked presentation. ERP priming effects for masked and unmasked repetition differed in older controls, and additionally, the ERP masked priming effect differed between controls and AD patients. Results are discussed in the context of studies that have examined memory performance in brain-damaged populations using an impaired-intact dichotomy.

    Original languageEnglish
    Pages (from-to)323-337
    Number of pages15
    JournalNeuropsychology
    Volume13
    Issue number3
    DOIs
    Publication statusPublished - Jul 1999

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